It's a fairly big questions you're asking. But basically you're onto it ;-)
Ad 1. You should go for something newer than 9.0
Ad 2. You need to decide on your maintenance schedule and policies for upgrades/patching etc. Many larger-scale deployments are based on SER 0.9.x because a) it has proven extremely stable b) it is currently maintained for bug and security fixes and will be for a while. Others choose openser to get more features, but you need to make sure that you can handle testing and deployment of new versions more often.
Ad 3. You need a RADIUS server with a user database or you can use mysql (you need mysql regardless of using RADIUS or not)

g-)

Concy Pereira wrote:

Sir,

I would like to know how can start a successful SIP base VOIP business. I have being going through some documentation of Open server software but could not come to a conclusion.

Anybody can suggest me a complete solution for running PC to Phone service Using GPL products, with accounting, authentication and authorization with different rate Plans etc.

Here is what I have decided to do.

SIP Server (Hardware)

1. Linux RedHat 9.0

2. OpenSer or SIP express router

3. Radius client

Accounting /CDR server ( Hardware)

1. Linux Redhat 9.0

2. CDRTool by ag-projects http://www.ag-projects.com/cdrtool.html

3. MySQL

1.Carrirer

Subcription to any International whole sale VOIP carrier

Please suggest if I have missed anything out.

Regards,

Concy
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